British Species of Caddis-flies. 127 
Steph. (*) Ill. p. 173, 5 (1836)?; H. maxima, Brauer, 
Neurop. Aust, p. 40 (1857). 
Antenne brown. Head fuscous, thickly clothed with yellowish- 
white silky pubescence. Palpi fuscous. Mesothorax dark black- 
ish-fuscous, clothed with whitish pubescence in the middle. An- 
terior wings broad, grey, thickly irrorated with pale yellow spots, 
with a larger elongate spot behind the anal angle; these spots are 
distinct in the living insect, but fade and become very indistinct 
in dry specimens. Posterior wings pale grey, subhyaline, the 
fringes dark grey. Legs uniform greyish-brown, Abdomen 
blackish-fuscous, brownish-ochreous beneath, and with pale lateral 
lines. In the male the superior horny lobe (see the generic de- 
scription, p. 124) is narrow, blackish and pointed, the membranous 
parts beneath it are yellow; app. sup. blackish, triangular; app. 
inf. with the basal joint very long, entirely yellowish, apical joint 
scarcely half the length of the basal, slightly dilated at the tip ; 
penis shining dark testaceous, the apex deeply divided, with a 
very conspicuous angular subapical projection on either side. 
Expanse of fore-wings 12—14: lines. 
Not an uncommon species in summer about streams. The 
largest of the British (perhaps also of the European) species, and, 
unless there be others closely allied, distinguishable by its size, 
combined with the prominent lateral projections below the apex 
of the penis. The types of H. hibernica are probably individuals 
just emerged from the pupa, and which consequently had not 
acquired their full measure of coloration. 
8. Hydropsyche lanceolata, Stephens. 
(Pl. I. fig. 7; Pl. XIII. figs. 10, 11, app.) 
Hydropsyche lanceolata, Steph. (*) Ill. p. 173, 6 (1836); H. 
atomaria, Steph. (*) Ill. p. 171, 1 (not of Pict.); H. guttata, 
Steph. Ill. p. 172, 3 (1836)?; Phalopotamus instabilis, Curt. 
Phil. Mag. p. 213, 7 (1834) ?; Mydropsyche Danubi, Brauer, 
Neurop. Aust. p. 40, (1857) ?. 
Antenne yellow, brown towards the apex; the oblique dark 
lines very conspicuous. Head thickly clothed with whitish- 
yellow pubescence. Palpi brown. Mesothorax pitchy-black. 
Anterior wings rather narrow; grey, thickly spotted with yellow, 
some of the spots on the dorsal margin and near the apex 
Jarger than the others; several short black lines placed on the 
longitudinal veins of the dorsal half of the wing. Posterior wings 
pale greyish, subhyaline, the fringes darker. Legs testaceous. 
